The Guxin coal‑gangue-specific color sorter is a core piece of equipment for intelligent sorting in coal mines. Built around AI‑powered multispectral technology, it supports both large‑particle and dry/wet operations, delivering high precision, high throughput, and low energy consumption. It helps coal mines improve product quality, reduce costs, boost efficiency, and meet environmental standards, enabling a seamless transition from conventional to smart sorting.

I. Product Applications

1 , Coal mine raw coal pretreatment  
Scene: Wellhead/Surface Raw Coal Stockpile, with a mix of 1–20 cm coal lumps and gangue.  
Value: Pre‑separation of gangue and enhancement of raw coal calorific value; reduction of unnecessary transportation and load on coal preparation plants; accuracy ≥ 99%; throughput ≥ 80 tonnes at ultra‑large particle sizes; carryover rate ≤ 2%.  
Compatibility: Dual‑mode—dry and wet—suitable for high‑humidity and dusty environments.  
2 , Secondary Quality Enhancement and Tailings Recovery at Coal Washery  
Scenario: Pre‑sorting before feed to the coal preparation plant, clean coal purification, and re‑processing of tailings and middlings.  
Value: Reduces reagent consumption in the washing process and improves the recovery rate of clean coal; the ash‑reduced tailings can be used as fuel for power generation or as a raw material for building materials.  
3 , Resource Utilization of Gangue Mountains  
Scenario: Mine spoil heaps and coal gangue storage areas, with sorting of large‑size and mixed gangue.  
Value: Separates low‑calorific‑value coal (for power generation) and high‑purity gangue (for brickmaking, cement production, or lightweight aggregate); contributes to solid‑waste reduction and ecological restoration.  
4 , Preprocessing of Building Materials and Power-Generation Raw Materials  
Scenario: The feed end of a coal gangue–based brick, cement, and aggregate production line, as well as a gangue‑fired power generation facility.  
Value: Removes impurities and stabilizes raw material quality; enhances the strength of building materials and the efficiency of power generation, while reducing energy consumption.  
5 , Special Operating Conditions and Supporting Equipment  
Particle size coverage: 3–8 cm for mainstream lump coal, compatible with specifications such as “3-8 lump.”  
Environmental Tolerance: Dustproof and shock-resistant, with stable operation from -25°C to 40°C.  
AI + Multispectral: Detects subtle differences in texture, grayscale, and material composition between coal and gangue, enabling millisecond‑level sorting.  
6 , Typical Customer Scenarios  
Large-scale coal mine: pre‑disposal of gangue at the shaft head plus coal‑washing plant for quality upgrading, with an annual processing capacity of one million tonnes.  
Small and medium-sized mines: Replacing manual sorting with dry‑screening on the surface cuts costs by over 60% and boosts efficiency fivefold.  
Resource‑utilization project: brick production, power generation, and backfilling following gangue sorting, transforming solid waste into valuable resources.

II. Technical Parameters

Note: The above yields are based on a particle size of 3–8 cm, with 5% impurities in the raw material.

III. Technical Advantages

1. Accuracy ≥ 99.9% +:
Equipped with a 5,400-pixel high-speed CCD, multispectral fusion, and AI deep learning, it precisely captures coal–gangue texture and color differences down to the 0.01 mm level, enabling millisecond‑level identification to eliminate missed selections and misjudgments.  
2. Full coverage with large particles:  
Industry-leading screening particle size range (1–20 cm), compatible with mainstream raw coal particle sizes, and capable of directly replacing trommel‑based gangue removal without the need for multi‑stage crushing.  
3. Truly dual-purpose for wet and dry use:
Moisture content ≤15%: Wet coal requires no drying or washing—direct sorting is possible. Resistant to dust and water stains, it saves over 90% of water and is well-suited for water-scarce or cold mining regions.  
4. Ultra-low carryover ratio:
Gangue in coal ≤ 2%, coal in gangue ≤ 2%; the yield of clean coal is as low as 0.3%, maximizing clean‑coal recovery and minimizing resource waste.  
5. High productivity with low energy consumption:  
With a throughput of over 80 tons per hour and a power consumption of just 6.5 kW, coal‑to‑electricity conversion costs are 43% of those for conventional wet‑washing, representing a more than 40% reduction in energy consumption and a cost cut of over 50%.  
6. Stable under extreme operating conditions:
Operates over a wide temperature range (-25°C to +45°C), features a fully sealed, dust‑ and vibration‑proof design, incorporates core components from leading international brands, boasts a service life of 20+ years, and delivers stable performance even in highly dusty environments.  
7. Intelligent Full Automation:
Industrial PLC with a Chinese-language touchscreen: one-touch start-up, automatic parameter tuning, self-learning, and self-cleaning; remote monitoring and fault early warning—easy to master in just half an hour.  
8. Modular Design:
With a simple, modular design that’s easy to disassemble and reassemble, it can be operated after just 30 minutes of training. Featuring few wear parts and low maintenance costs, it requires no major overhauls throughout the year, thereby minimizing downtime-related losses.  
9. Zero coal slime, zero discharge:
Waterless dry separation, no coal slime, no wastewater discharge, and no need for coal‑washing reagents—meeting environmental standards and supporting the development of green mines.  
10. High cost-effectiveness:
Performance on par with imported models, at a price more than 50% lower; 5-minute response time, 24-hour door-to-door service, localized support, ample spare parts—so you can rest easy.

IV. Color Sorting Case Studies